Malicious PDF — malware analysis report

Static analysis result for SHA-256 c48e5f6e716b8125…

MALICIOUS

PDF

40.7 KB Created: 2020-08-09 18:05:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b29718b366c3845089d1c7a4bf311b5 SHA-1: 19cc0c6a18dfeb5a6d1906efae00c907c910f6a8 SHA-256: c48e5f6e716b8125c4d4f935025eb78bf364f736154a54bab330e7f0f62ca836
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains, including a redirector. The primary malicious link, https://ttraff.ru/pify?keyword=herman+miller+aeron+chair+manual+pdf, suggests a lure to download a manual, likely leading to a malicious payload or phishing site. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=herman+miller+aeron+chair+manual+pdf
    • http://komuxi.40yearsafter.com/uploads/1/3/2/8/132814930/livolotaj.pdf
    • http://files.mountainsportandfitness.com/uploads/1/3/0/8/130813866/sovofaxi.pdf
    • http://files.londonderryhomeowners.com/uploads/1/3/1/8/131871501/9774432.pdf
    • https://cdn.shopify.com/s/files/1/0437/5176/8225/files/9397833688.pdf
    • https://cdn.shopify.com/s/files/1/0440/6149/1365/files/san_andreas_pc_cheats.pdf
    • https://cdn.shopify.com/s/files/1/0432/2308/9307/files/suwivabadamimobabafox.pdf
    • https://cdn.shopify.com/s/files/1/0433/0595/9574/files/nibafopipedatukunobofaru.pdf
    • https://cdn.shopify.com/s/files/1/0435/5656/9247/files/money_management_budget.pdf
    • https://cdn.shopify.com/s/files/1/0437/8152/1565/files/accountancy_project_class_12_cbse.pdf
    • https://cdn.shopify.com/s/files/1/0433/2794/6904/files/51092504312.pdf
    • https://cdn.shopify.com/s/files/1/0433/6533/5190/files/rekuxudekoxuwukivarejeso.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xopafomapezujiwowab.pdf
    • https://cdn.shopify.com/s/files/1/0436/7020/8662/files/25446327248.pdf
    • https://cdn.shopify.com/s/files/1/0429/1022/0447/files/tikowolidefebizimogirun.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000604d.bin
85206a77c679c510ecbb13ea52410b02bf9ba9e9662da021b20164c5fcf6d29a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x604D 5176 bytes
font_01_sfnt_off000071b7.bin
f87f8e4df52dab013994db130188b462505abe0f39e8be423d43600c0c0d65eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71B7 10228 bytes

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